Panasonic S9 vs Sony A77 II

The Panasonic Lumix DC-S9 and the Sony Alpha SLT-A77 II are two enthusiast cameras that were announced, respectively, in May 2024 and May 2014. The S9 is a mirrorless interchangeable lens camera, while the A77 II is a DSLR. The cameras are based on a full frame (S9) and an APS-C (A77 II) sensor. Both cameras offer a resolution of 24 megapixels.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications

Panasonic S9		Sony A77 II
Mirrorless system camera		Digital single lens reflex
Leica L mount lenses		Sony A mount lenses
24 MP – Full Frame sensor		24 MP – APS-C sensor
6K/30p Video		1080/60p Video
ISO 100-51,200 (50 - 204,800)		ISO 100-25,600 (50 - 51,200)
No viewfinder, LCD framing		Electronic viewfinder (2359k dots)
3.0" LCD – 1840k dots		3.0" LCD – 1229k dots
Swivel touchscreen		Fully flexible screen (no touchscreen)
30 shutter flaps per second		12 shutter flaps per second
In-body stabilization		In-body stabilization
not weather sealed		Weathersealed body
470 shots per battery charge		480 shots per battery charge
126 x 74 x 47 mm, 486 g		143 x 104 x 81 mm, 647 g

Check S9 price at
amazon.com
Check A77 II offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DC-S9 and the Sony Alpha SLT-A77 II? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

Body comparison

The physical size and weight of the Panasonic S9 and the Sony A77 II are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

The S9 can be obtained in four different colors (black, blue, red, green), while the A77 II is only available in black.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A77 II is considerably larger (60 percent) than the Panasonic S9. Moreover, the A77 II is markedly heavier (33 percent) than the S9. It is noteworthy in this context that the A77 II is splash and dust-proof, while the S9 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the S9 gets 470 shots out of its Panasonic DMW-BLK22 battery, while the A77 II can take 480 images on a single charge of its Sony NP-FM500H power pack. The power pack in the S9 can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Panasonic S9	126 mm	74 mm	47 mm	486 g	470	n	May 2024	EUR 1 699	amazon.com
2.		Sony A77 II	143 mm	104 mm	81 mm	647 g	480	Y	May 2014	EUR 1 199	ebay.com
3.		Canon R8	133 mm	86 mm	70 mm	461 g	220	n	Feb 2023	EUR 1 799	amazon.com
4.		Fujifilm X-E5	125 mm	73 mm	39 mm	445 g	305	n	Jun 2025	EUR 1 549	amazon.com
5.		Fujifilm X-S10	126 mm	85 mm	65 mm	465 g	325	n	Oct 2020	EUR 999	amazon.com
6.		Fujifilm X-S20	128 mm	85 mm	65 mm	491 g	750	n	May 2023	EUR 1 399	amazon.com
7.		Fujifilm X-T50	124 mm	84 mm	49 mm	438 g	305	n	May 2024	EUR 1 499	amazon.com
8.		Panasonic GX8	133 mm	78 mm	63 mm	487 g	330	Y	Jul 2015	EUR 1 199	ebay.com
9.		Panasonic GX9	124 mm	72 mm	47 mm	407 g	260	n	Feb 2018	EUR 799	ebay.com
10.		Panasonic S1 II	134 mm	102 mm	92 mm	800 g	350	Y	May 2025	EUR 3 499	amazon.com
11.		Panasonic S5 II	134 mm	102 mm	90 mm	740 g	370	Y	Jan 2023	EUR 2 199	amazon.com
12.		Sony A7 II	127 mm	96 mm	60 mm	599 g	350	Y	Nov 2014	EUR 2 099	ebay.com
13.		Sony A7C	124 mm	71 mm	60 mm	509 g	740	Y	Sep 2020	EUR 2 099	amazon.com
14.		Sony A7S II	127 mm	96 mm	60 mm	627 g	370	Y	Sep 2015	EUR 3 399	ebay.com
15.		Sony A9	127 mm	96 mm	63 mm	673 g	650	Y	Apr 2017	EUR 5 299	ebay.com
16.		Sony A77	143 mm	104 mm	81 mm	732 g	470	Y	Aug 2011	EUR 1 299	ebay.com
17.		Sony A6700	122 mm	69 mm	64 mm	493 g	570	Y	Jul 2023	EUR 1 699	amazon.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
Convert to Imperial

Any camera decision will obviously take relative prices into account. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The A77 II was launched at a somewhat lower price (by 20 percent) than the S9, which makes it more attractive for photographers on a tight budget. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down.

Sensor comparison

The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Panasonic S9 features a full frame sensor and the Sony A77 II an APS-C sensor. The sensor area in the A77 II is 57 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Even though the S9 has a larger sensor, both cameras offer the same resolution of 24 megapixels. This implies that the S9 has a lower pixel density and larger individual pixels (with a pixel pitch of 5.94μm versus 3.91μm for the A77 II), which gives it a potential advantage in terms of light gathering capacity. In addition, the S9 is much more recent (by 10 years) than the A77 II, and its sensor will have benefitted from technological advances during this time. Coming back to sensor resolution, it should be mentioned that the S9 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The S9 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Panasonic Lumix DC-S9 has a native sensitivity range from ISO 100 to ISO 51200, which can be extended to ISO 50-204800. The corresponding ISO settings for the Sony Alpha SLT-A77 II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-51200.

In terms of underlying technology, the S9 is build around a BSI-CMOS sensor, while the A77 II uses a CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Panasonic S9	Full Frame	24.0	6000	4000	6K/30p	25.4	14.8	3297	96
2.		Sony A77 II	APS-C	24.0	6000	4000	1080/60p	24.4	13.4	1013	82
3.		Canon R8	Full Frame	24.0	6000	4000	4k/60p	24.5	14.7	3295	93
4.		Fujifilm X-E5	APS-C	39.8	7728	5152	6.2k/30p	24.3	14.2	2523	86
5.		Fujifilm X-S10	APS-C	26.0	6240	4160	4K/30p	24.2	13.7	2057	85
6.		Fujifilm X-S20	APS-C	26.0	6240	4160	4K/60p	24.3	14.0	2315	86
7.		Fujifilm X-T50	APS-C	39.8	7728	5152	6.2k/30p	24.3	14.1	2418	86
8.		Panasonic GX8	Four Thirds	20.2	5184	3888	4K/30p	23.5	12.6	806	75
9.		Panasonic GX9	Four Thirds	20.2	5184	3888	4K/30p	23.1	12.8	1163	74
10.		Panasonic S1 II	Full Frame	24.0	6000	4000	6K/30p	25.4	14.8	3406	97
11.		Panasonic S5 II	Full Frame	24.0	6000	4000	6K/30p	25.4	14.6	3158	96
12.		Sony A7 II	Full Frame	24.0	6000	4000	1080/60p	24.9	13.6	2449	90
13.		Sony A7C	Full Frame	24.0	6000	4000	4K/30p	25.0	14.7	3407	95
14.		Sony A7S II	Full Frame	12.0	4240	2832	4K/30p	23.6	13.3	2993	85
15.		Sony A9	Full Frame	24.0	6000	4000	4K/30p	24.9	13.3	3517	92
16.		Sony A77	APS-C	24.0	6000	4000	1080/60p	24.0	13.2	801	78
17.		Sony A6700	APS-C	25.6	6192	4128	4K/120p	24.3	14.0	2329	86
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the S9 provides a higher video resolution than the A77 II. It can shoot video footage at 6K/30p, while the Sony is limited to 1080/60p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A77 II has an electronic viewfinder (2359k dots), which can be very helpful when shooting in bright sunlight. In contrast, the S9 relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Panasonic S9 and Sony A77 II in connection with corresponding information for a sample of similar cameras.

Core Features

		Camera Model	Viewfinder (Type or 000 dots)	Control Panel (yes/no)	LCD Specifications (inch/000 dots)	LCD Attach- ment	Touch Screen (yes/no)	Max Shutter Speed *	Max Shutter Flaps *	Built-in Flash (yes/no)	Built-in Image Stab
1.		Panasonic S9	none	n	3.0 / 1840	swivel	Y	1/8000s	30.0/s	n	Y
2.		Sony A77 II	2359	Y	3.0 / 1229	full-flex	n	1/8000s	12.0/s	Y	Y
3.		Canon R8	2360	n	3.0 / 1620	swivel	Y	1/4000s	6.0/s	n	n
4.		Fujifilm X-E5	2360	n	3.0 / 1040	tilting	Y	1/4000s	8.0/s	n	Y
5.		Fujifilm X-S10	2360	n	3.0 / 1040	swivel	Y	1/4000s	8.0/s	Y	Y
6.		Fujifilm X-S20	2360	n	3.0 / 1840	swivel	Y	1/4000s	8.0/s	Y	Y
7.		Fujifilm X-T50	2360	n	3.0 / 1840	tilting	Y	1/4000s	8.0/s	Y	Y
8.		Panasonic GX8	2360	n	3.0 / 1040	swivel	Y	1/8000s	10.0/s	n	Y
9.		Panasonic GX9	2760	n	3.0 / 1240	tilting	Y	1/4000s	9.0/s	Y	Y
10.		Panasonic S1 II	5760	n	3.2 / 1840	full-flex	Y	1/8000s	10.0/s	n	Y
11.		Panasonic S5 II	3680	n	3.0 / 1840	swivel	Y	1/8000s	9.0/s	n	Y
12.		Sony A7 II	2400	n	3.0 / 1230	tilting	n	1/8000s	5.0/s	n	Y
13.		Sony A7C	2360	n	3.0 / 922	swivel	Y	1/4000s	10.0/s	n	Y
14.		Sony A7S II	2400	n	3.0 / 1229	tilting	n	1/8000s	5.0/s	n	Y
15.		Sony A9	3686	n	3.0 / 1440	tilting	Y	1/8000s	20.0/s	n	Y
16.		Sony A77	2359	Y	3.0 / 921	full-flex	n	1/8000s	12.0/s	Y	Y
17.		Sony A6700	2360	n	3.0 / 1037	swivel	Y	1/4000s	11.0/s	n	Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The S9 has a touchscreen, while the A77 II has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the S9 is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Panasonic S9 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The S9 writes its imaging data to SDXC cards, while the A77 II uses SDXC or Memory Stick PRO Duo cards. The S9 supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the A77 II can use UHS-I cards (up to 104 MB/s).

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Panasonic Lumix DC-S9 and Sony Alpha SLT-A77 II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections

		Camera Model	Hotshoe Port	Internal Mic / Speaker	Microphone Port	Headphone Port	HDMI Port	USB Port	WiFi Support	NFC Support	Bluetooth Support
1.		Panasonic S9	Y	stereo / mono	Y	-	micro	3.2	Y	-	Y
2.		Sony A77 II	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
3.		Canon R8	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
4.		Fujifilm X-E5	Y	stereo / mono	Y	-	micro	3.2	Y	-	Y
5.		Fujifilm X-S10	Y	stereo / mono	Y	-	micro	3.2	Y	-	Y
6.		Fujifilm X-S20	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
7.		Fujifilm X-T50	Y	stereo / mono	Y	-	micro	3.2	Y	-	Y
8.		Panasonic GX8	Y	stereo / mono	Y	-	micro	2.0	Y	Y	-
9.		Panasonic GX9	Y	stereo / mono	-	-	micro	2.0	Y	-	Y
10.		Panasonic S1 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
11.		Panasonic S5 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
12.		Sony A7 II	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
13.		Sony A7C	Y	stereo / mono	Y	Y	micro	3.2	Y	Y	Y
14.		Sony A7S II	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
15.		Sony A9	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	Y
16.		Sony A77	Y	stereo / mono	Y	-	mini	2.0	-	-	-
17.		Sony A6700	Y	stereo / mono	Y	Y	YES	3.2	Y	Y	Y

Studio photographers will appreciate that the Sony A77 II (unlike the S9) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The S9 is a recent model that features in the current product line-up of Panasonic. In contrast, the A77 II has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the A77 II from Sony. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Panasonic and Sony websites.

Review summary

So what is the bottom line? Is there a clear favorite between the Panasonic S9 and the Sony A77 II? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

Advantages of the Panasonic Lumix DC-S9:

• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Better image quality: Features a larger and more technologically advanced imaging sensor.
• Richer colors: The sensor size advantage translates into images with better, more accurate colors.
• More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
• Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
• Better video: Provides higher definition movie capture (6K/30p vs 1080/60p).
• Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
• More detailed LCD: Has a higher resolution rear screen (1840k vs 1229k dots).
• Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
• Faster burst: Shoots at higher frequency (30 vs 12 flaps/sec) to capture the decisive moment.
• Less disturbing: Has an electronic shutter option for completely silent shooting.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• More compact: Is smaller (126x74mm vs 143x104mm) and thus needs less room in the bag.
• Less heavy: Is lighter (by 161g or 25 percent) and hence easier to carry around.
• Easier travel charging: Can be conveniently charged via its USB port.
• More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
• Faster data transfer: Supports a more advanced USB protocol (3.2 vs 2.0).
• Easier wireless transfer: Supports Bluetooth for image sharing without cables.
• Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
• More modern: Reflects 10 years of technical progress since the A77 II launch.

Reasons to prefer the Sony Alpha SLT-A77 II:

• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• Easier framing: Has an electronic viewfinder for image composition and settings control.
• Easier setting verification: Features a control panel on top to check shooting parameters.
• Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
• Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
• Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
• Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
• More affordable: Was released into a lower priced segment (20 percent cheaper at launch).
• More heavily discounted: Has been around for much longer (launched in May 2014).

If the count of relative strengths (bullet points above) is taken as a measure, the S9 is the clear winner of the match-up (20 : 9 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

How about other alternatives? Do the specifications of the Panasonic S9 and the Sony A77 II place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the S9 or the A77 II perform in practice. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

Expert Camera Reviews

		Camera   Model	AP   score	CL   score	DCW   score	DPR   score	EPZ   score	PB   score	Camera Launch	Launch Price	Street Price
1.		Panasonic S9	..	..	..	..	..	..	May 2024	EUR 1 699	amazon.com
2.		Sony A77 II	4/5	..	..	80/100	4.5/5	5/5	May 2014	EUR 1 199	ebay.com
3.		Canon R8	4.5/5	+ +	4.5/5	87/100	4/5	4.5/5	Feb 2023	EUR 1 799	amazon.com
4.		Fujifilm X-E5	..	..	..	..	..	..	Jun 2025	EUR 1 549	amazon.com
5.		Fujifilm X-S10	5/5	..	4.5/5	86/100	4.5/5	4.5/5	Oct 2020	EUR 999	amazon.com
6.		Fujifilm X-S20	5/5	+ +	5/5	86/100	..	4.5/5	May 2023	EUR 1 399	amazon.com
7.		Fujifilm X-T50	..	..	..	85/100	..	..	May 2024	EUR 1 499	amazon.com
8.		Panasonic GX8	5/5	+	..	82/100	4.5/5	4.5/5	Jul 2015	EUR 1 199	ebay.com
9.		Panasonic GX9	4/5	+	4/5	84/100	4.5/5	4.5/5	Feb 2018	EUR 799	ebay.com
10.		Panasonic S1 II	..	..	..	..	..	..	May 2025	EUR 3 499	amazon.com
11.		Panasonic S5 II	4.5/5	+ +	5/5	90/100	4.5/5	5/5	Jan 2023	EUR 2 199	amazon.com
12.		Sony A7 II	5/5	+	4/5	82/100	4.5/5	5/5	Nov 2014	EUR 2 099	ebay.com
13.		Sony A7C	3.5/5	..	3.5/5	86/100	4/5	4/5	Sep 2020	EUR 2 099	amazon.com
14.		Sony A7S II	5/5	+	..	..	4.5/5	5/5	Sep 2015	EUR 3 399	ebay.com
15.		Sony A9	5/5	+ +	4.8/5	89/100	5/5	5/5	Apr 2017	EUR 5 299	ebay.com
16.		Sony A77	5/5	91/100	..	81/100	..	5/5	Aug 2011	EUR 1 299	ebay.com
17.		Sony A6700	4.5/5	+	4.5/5	88/100	4.5/5	4.5/5	Jul 2023	EUR 1 699	amazon.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

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Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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